1/* 2 * drivers/s390/char/tape_3590.c 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001, 2009 6 * Author(s): Stefan Bader <shbader@de.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Martin Schwidefsky <schwidefsky@de.ibm.com> 9 */ 10 11#define KMSG_COMPONENT "tape_3590" 12#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14#include <linux/module.h> 15#include <linux/slab.h> 16#include <linux/init.h> 17#include <linux/bio.h> 18#include <asm/ebcdic.h> 19 20#define TAPE_DBF_AREA tape_3590_dbf 21#define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 22 23#include "tape.h" 24#include "tape_std.h" 25#include "tape_3590.h" 26 27/* 28 * Pointer to debug area. 29 */ 30debug_info_t *TAPE_DBF_AREA = NULL; 31EXPORT_SYMBOL(TAPE_DBF_AREA); 32 33/******************************************************************* 34 * Error Recovery fuctions: 35 * - Read Opposite: implemented 36 * - Read Device (buffered) log: BRA 37 * - Read Library log: BRA 38 * - Swap Devices: BRA 39 * - Long Busy: implemented 40 * - Special Intercept: BRA 41 * - Read Alternate: implemented 42 *******************************************************************/ 43 44static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 45 [0x00] = "", 46 [0x10] = "Lost Sense", 47 [0x11] = "Assigned Elsewhere", 48 [0x12] = "Allegiance Reset", 49 [0x13] = "Shared Access Violation", 50 [0x20] = "Command Reject", 51 [0x21] = "Configuration Error", 52 [0x22] = "Protection Exception", 53 [0x23] = "Write Protect", 54 [0x24] = "Write Length", 55 [0x25] = "Read-Only Format", 56 [0x31] = "Beginning of Partition", 57 [0x33] = "End of Partition", 58 [0x34] = "End of Data", 59 [0x35] = "Block not found", 60 [0x40] = "Device Intervention", 61 [0x41] = "Loader Intervention", 62 [0x42] = "Library Intervention", 63 [0x50] = "Write Error", 64 [0x51] = "Erase Error", 65 [0x52] = "Formatting Error", 66 [0x53] = "Read Error", 67 [0x54] = "Unsupported Format", 68 [0x55] = "No Formatting", 69 [0x56] = "Positioning lost", 70 [0x57] = "Read Length", 71 [0x60] = "Unsupported Medium", 72 [0x61] = "Medium Length Error", 73 [0x62] = "Medium removed", 74 [0x64] = "Load Check", 75 [0x65] = "Unload Check", 76 [0x70] = "Equipment Check", 77 [0x71] = "Bus out Check", 78 [0x72] = "Protocol Error", 79 [0x73] = "Interface Error", 80 [0x74] = "Overrun", 81 [0x75] = "Halt Signal", 82 [0x90] = "Device fenced", 83 [0x91] = "Device Path fenced", 84 [0xa0] = "Volume misplaced", 85 [0xa1] = "Volume inaccessible", 86 [0xa2] = "Volume in input", 87 [0xa3] = "Volume ejected", 88 [0xa4] = "All categories reserved", 89 [0xa5] = "Duplicate Volume", 90 [0xa6] = "Library Manager Offline", 91 [0xa7] = "Library Output Station full", 92 [0xa8] = "Vision System non-operational", 93 [0xa9] = "Library Manager Equipment Check", 94 [0xaa] = "Library Equipment Check", 95 [0xab] = "All Library Cells full", 96 [0xac] = "No Cleaner Volumes in Library", 97 [0xad] = "I/O Station door open", 98 [0xae] = "Subsystem environmental alert", 99}; 100 101static int crypt_supported(struct tape_device *device) 102{ 103 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 104} 105 106static int crypt_enabled(struct tape_device *device) 107{ 108 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 109} 110 111static void ext_to_int_kekl(struct tape390_kekl *in, 112 struct tape3592_kekl *out) 113{ 114 int i; 115 116 memset(out, 0, sizeof(*out)); 117 if (in->type == TAPE390_KEKL_TYPE_HASH) 118 out->flags |= 0x40; 119 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 120 out->flags |= 0x80; 121 strncpy(out->label, in->label, 64); 122 for (i = strlen(in->label); i < sizeof(out->label); i++) 123 out->label[i] = ' '; 124 ASCEBC(out->label, sizeof(out->label)); 125} 126 127static void int_to_ext_kekl(struct tape3592_kekl *in, 128 struct tape390_kekl *out) 129{ 130 memset(out, 0, sizeof(*out)); 131 if(in->flags & 0x40) 132 out->type = TAPE390_KEKL_TYPE_HASH; 133 else 134 out->type = TAPE390_KEKL_TYPE_LABEL; 135 if(in->flags & 0x80) 136 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 137 else 138 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 139 memcpy(out->label, in->label, sizeof(in->label)); 140 EBCASC(out->label, sizeof(in->label)); 141 strim(out->label); 142} 143 144static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 145 struct tape390_kekl_pair *out) 146{ 147 if (in->count == 0) { 148 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 149 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 150 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 151 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 152 } else if (in->count == 1) { 153 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 154 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 155 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 156 } else if (in->count == 2) { 157 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 158 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 159 } else { 160 printk("Invalid KEKL number: %d\n", in->count); 161 BUG(); 162 } 163} 164 165static int check_ext_kekl(struct tape390_kekl *kekl) 166{ 167 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 168 goto invalid; 169 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 170 goto invalid; 171 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 172 goto invalid; 173 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 174 goto invalid; 175 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 176 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 177 goto invalid; 178 179 return 0; 180invalid: 181 return -EINVAL; 182} 183 184static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 185{ 186 if (check_ext_kekl(&kekls->kekl[0])) 187 goto invalid; 188 if (check_ext_kekl(&kekls->kekl[1])) 189 goto invalid; 190 191 return 0; 192invalid: 193 return -EINVAL; 194} 195 196/* 197 * Query KEKLs 198 */ 199static int tape_3592_kekl_query(struct tape_device *device, 200 struct tape390_kekl_pair *ext_kekls) 201{ 202 struct tape_request *request; 203 struct tape3592_kekl_query_order *order; 204 struct tape3592_kekl_query_data *int_kekls; 205 int rc; 206 207 DBF_EVENT(6, "tape3592_kekl_query\n"); 208 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 209 if (!int_kekls) 210 return -ENOMEM; 211 request = tape_alloc_request(2, sizeof(*order)); 212 if (IS_ERR(request)) { 213 rc = PTR_ERR(request); 214 goto fail_malloc; 215 } 216 order = request->cpdata; 217 memset(order,0,sizeof(*order)); 218 order->code = 0xe2; 219 order->max_count = 2; 220 request->op = TO_KEKL_QUERY; 221 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 222 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 223 int_kekls); 224 rc = tape_do_io(device, request); 225 if (rc) 226 goto fail_request; 227 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 228 229 rc = 0; 230fail_request: 231 tape_free_request(request); 232fail_malloc: 233 kfree(int_kekls); 234 return rc; 235} 236 237/* 238 * IOCTL: Query KEKLs 239 */ 240static int tape_3592_ioctl_kekl_query(struct tape_device *device, 241 unsigned long arg) 242{ 243 int rc; 244 struct tape390_kekl_pair *ext_kekls; 245 246 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 247 if (!crypt_supported(device)) 248 return -ENOSYS; 249 if (!crypt_enabled(device)) 250 return -EUNATCH; 251 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 252 if (!ext_kekls) 253 return -ENOMEM; 254 rc = tape_3592_kekl_query(device, ext_kekls); 255 if (rc != 0) 256 goto fail; 257 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 258 rc = -EFAULT; 259 goto fail; 260 } 261 rc = 0; 262fail: 263 kfree(ext_kekls); 264 return rc; 265} 266 267static int tape_3590_mttell(struct tape_device *device, int mt_count); 268 269/* 270 * Set KEKLs 271 */ 272static int tape_3592_kekl_set(struct tape_device *device, 273 struct tape390_kekl_pair *ext_kekls) 274{ 275 struct tape_request *request; 276 struct tape3592_kekl_set_order *order; 277 278 DBF_EVENT(6, "tape3592_kekl_set\n"); 279 if (check_ext_kekl_pair(ext_kekls)) { 280 DBF_EVENT(6, "invalid kekls\n"); 281 return -EINVAL; 282 } 283 if (tape_3590_mttell(device, 0) != 0) 284 return -EBADSLT; 285 request = tape_alloc_request(1, sizeof(*order)); 286 if (IS_ERR(request)) 287 return PTR_ERR(request); 288 order = request->cpdata; 289 memset(order, 0, sizeof(*order)); 290 order->code = 0xe3; 291 order->kekls.count = 2; 292 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 293 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 294 request->op = TO_KEKL_SET; 295 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 296 297 return tape_do_io_free(device, request); 298} 299 300/* 301 * IOCTL: Set KEKLs 302 */ 303static int tape_3592_ioctl_kekl_set(struct tape_device *device, 304 unsigned long arg) 305{ 306 int rc; 307 struct tape390_kekl_pair *ext_kekls; 308 309 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 310 if (!crypt_supported(device)) 311 return -ENOSYS; 312 if (!crypt_enabled(device)) 313 return -EUNATCH; 314 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 315 if (!ext_kekls) 316 return -ENOMEM; 317 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 318 rc = -EFAULT; 319 goto out; 320 } 321 rc = tape_3592_kekl_set(device, ext_kekls); 322out: 323 kfree(ext_kekls); 324 return rc; 325} 326 327/* 328 * Enable encryption 329 */ 330static int tape_3592_enable_crypt(struct tape_device *device) 331{ 332 struct tape_request *request; 333 char *data; 334 335 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 336 if (!crypt_supported(device)) 337 return -ENOSYS; 338 request = tape_alloc_request(2, 72); 339 if (IS_ERR(request)) 340 return PTR_ERR(request); 341 data = request->cpdata; 342 memset(data,0,72); 343 344 data[0] = 0x05; 345 data[36 + 0] = 0x03; 346 data[36 + 1] = 0x03; 347 data[36 + 4] = 0x40; 348 data[36 + 6] = 0x01; 349 data[36 + 14] = 0x2f; 350 data[36 + 18] = 0xc3; 351 data[36 + 35] = 0x72; 352 request->op = TO_CRYPT_ON; 353 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 354 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 355 return tape_do_io_free(device, request); 356} 357 358/* 359 * Disable encryption 360 */ 361static int tape_3592_disable_crypt(struct tape_device *device) 362{ 363 struct tape_request *request; 364 char *data; 365 366 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 367 if (!crypt_supported(device)) 368 return -ENOSYS; 369 request = tape_alloc_request(2, 72); 370 if (IS_ERR(request)) 371 return PTR_ERR(request); 372 data = request->cpdata; 373 memset(data,0,72); 374 375 data[0] = 0x05; 376 data[36 + 0] = 0x03; 377 data[36 + 1] = 0x03; 378 data[36 + 35] = 0x32; 379 380 request->op = TO_CRYPT_OFF; 381 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 382 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 383 384 return tape_do_io_free(device, request); 385} 386 387/* 388 * IOCTL: Set encryption status 389 */ 390static int tape_3592_ioctl_crypt_set(struct tape_device *device, 391 unsigned long arg) 392{ 393 struct tape390_crypt_info info; 394 395 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 396 if (!crypt_supported(device)) 397 return -ENOSYS; 398 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 399 return -EFAULT; 400 if (info.status & ~TAPE390_CRYPT_ON_MASK) 401 return -EINVAL; 402 if (info.status & TAPE390_CRYPT_ON_MASK) 403 return tape_3592_enable_crypt(device); 404 else 405 return tape_3592_disable_crypt(device); 406} 407 408static int tape_3590_sense_medium(struct tape_device *device); 409 410/* 411 * IOCTL: Query enryption status 412 */ 413static int tape_3592_ioctl_crypt_query(struct tape_device *device, 414 unsigned long arg) 415{ 416 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 417 if (!crypt_supported(device)) 418 return -ENOSYS; 419 tape_3590_sense_medium(device); 420 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 421 sizeof(TAPE_3590_CRYPT_INFO(device)))) 422 return -EFAULT; 423 else 424 return 0; 425} 426 427/* 428 * 3590 IOCTL Overload 429 */ 430static int 431tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 432{ 433 switch (cmd) { 434 case TAPE390_DISPLAY: { 435 struct display_struct disp; 436 437 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 438 return -EFAULT; 439 440 return tape_std_display(device, &disp); 441 } 442 case TAPE390_KEKL_SET: 443 return tape_3592_ioctl_kekl_set(device, arg); 444 case TAPE390_KEKL_QUERY: 445 return tape_3592_ioctl_kekl_query(device, arg); 446 case TAPE390_CRYPT_SET: 447 return tape_3592_ioctl_crypt_set(device, arg); 448 case TAPE390_CRYPT_QUERY: 449 return tape_3592_ioctl_crypt_query(device, arg); 450 default: 451 return -EINVAL; /* no additional ioctls */ 452 } 453} 454 455/* 456 * SENSE Medium: Get Sense data about medium state 457 */ 458static int 459tape_3590_sense_medium(struct tape_device *device) 460{ 461 struct tape_request *request; 462 463 request = tape_alloc_request(1, 128); 464 if (IS_ERR(request)) 465 return PTR_ERR(request); 466 request->op = TO_MSEN; 467 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 468 return tape_do_io_free(device, request); 469} 470 471/* 472 * MTTELL: Tell block. Return the number of block relative to current file. 473 */ 474static int 475tape_3590_mttell(struct tape_device *device, int mt_count) 476{ 477 __u64 block_id; 478 int rc; 479 480 rc = tape_std_read_block_id(device, &block_id); 481 if (rc) 482 return rc; 483 return block_id >> 32; 484} 485 486/* 487 * MTSEEK: seek to the specified block. 488 */ 489static int 490tape_3590_mtseek(struct tape_device *device, int count) 491{ 492 struct tape_request *request; 493 494 DBF_EVENT(6, "xsee id: %x\n", count); 495 request = tape_alloc_request(3, 4); 496 if (IS_ERR(request)) 497 return PTR_ERR(request); 498 request->op = TO_LBL; 499 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 500 *(__u32 *) request->cpdata = count; 501 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 502 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 503 return tape_do_io_free(device, request); 504} 505 506/* 507 * Read Opposite Error Recovery Function: 508 * Used, when Read Forward does not work 509 */ 510static void 511tape_3590_read_opposite(struct tape_device *device, 512 struct tape_request *request) 513{ 514 struct tape_3590_disc_data *data; 515 516 /* 517 * We have allocated 4 ccws in tape_std_read, so we can now 518 * transform the request to a read backward, followed by a 519 * forward space block. 520 */ 521 request->op = TO_RBA; 522 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 523 data = device->discdata; 524 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 525 device->char_data.idal_buf); 526 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 527 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 528 DBF_EVENT(6, "xrop ccwg\n"); 529} 530 531/* 532 * Read Attention Msg 533 * This should be done after an interrupt with attention bit (0x80) 534 * in device state. 535 * 536 * After a "read attention message" request there are two possible 537 * results: 538 * 539 * 1. A unit check is presented, when attention sense is present (e.g. when 540 * a medium has been unloaded). The attention sense comes then 541 * together with the unit check. The recovery action is either "retry" 542 * (in case there is an attention message pending) or "permanent error". 543 * 544 * 2. The attention msg is written to the "read subsystem data" buffer. 545 * In this case we probably should print it to the console. 546 */ 547static int 548tape_3590_read_attmsg(struct tape_device *device) 549{ 550 struct tape_request *request; 551 char *buf; 552 553 request = tape_alloc_request(3, 4096); 554 if (IS_ERR(request)) 555 return PTR_ERR(request); 556 request->op = TO_READ_ATTMSG; 557 buf = request->cpdata; 558 buf[0] = PREP_RD_SS_DATA; 559 buf[6] = RD_ATTMSG; /* read att msg */ 560 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 561 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 562 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 563 return tape_do_io_free(device, request); 564} 565 566/* 567 * These functions are used to schedule follow-up actions from within an 568 * interrupt context (like unsolicited interrupts). 569 */ 570struct work_handler_data { 571 struct tape_device *device; 572 enum tape_op op; 573 struct work_struct work; 574}; 575 576static void 577tape_3590_work_handler(struct work_struct *work) 578{ 579 struct work_handler_data *p = 580 container_of(work, struct work_handler_data, work); 581 582 switch (p->op) { 583 case TO_MSEN: 584 tape_3590_sense_medium(p->device); 585 break; 586 case TO_READ_ATTMSG: 587 tape_3590_read_attmsg(p->device); 588 break; 589 case TO_CRYPT_ON: 590 tape_3592_enable_crypt(p->device); 591 break; 592 case TO_CRYPT_OFF: 593 tape_3592_disable_crypt(p->device); 594 break; 595 default: 596 DBF_EVENT(3, "T3590: work handler undefined for " 597 "operation 0x%02x\n", p->op); 598 } 599 tape_put_device(p->device); 600 kfree(p); 601} 602 603static int 604tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 605{ 606 struct work_handler_data *p; 607 608 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 609 return -ENOMEM; 610 611 INIT_WORK(&p->work, tape_3590_work_handler); 612 613 p->device = tape_get_device(device); 614 p->op = op; 615 616 schedule_work(&p->work); 617 return 0; 618} 619 620#ifdef CONFIG_S390_TAPE_BLOCK 621/* 622 * Tape Block READ 623 */ 624static struct tape_request * 625tape_3590_bread(struct tape_device *device, struct request *req) 626{ 627 struct tape_request *request; 628 struct ccw1 *ccw; 629 int count = 0, start_block; 630 unsigned off; 631 char *dst; 632 struct bio_vec *bv; 633 struct req_iterator iter; 634 635 DBF_EVENT(6, "xBREDid:"); 636 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; 637 DBF_EVENT(6, "start_block = %i\n", start_block); 638 639 rq_for_each_segment(bv, req, iter) 640 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 641 642 request = tape_alloc_request(2 + count + 1, 4); 643 if (IS_ERR(request)) 644 return request; 645 request->op = TO_BLOCK; 646 *(__u32 *) request->cpdata = start_block; 647 ccw = request->cpaddr; 648 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 649 650 /* 651 * We always setup a nop after the mode set ccw. This slot is 652 * used in tape_std_check_locate to insert a locate ccw if the 653 * current tape position doesn't match the start block to be read. 654 */ 655 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 656 657 rq_for_each_segment(bv, req, iter) { 658 dst = page_address(bv->bv_page) + bv->bv_offset; 659 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { 660 ccw->flags = CCW_FLAG_CC; 661 ccw->cmd_code = READ_FORWARD; 662 ccw->count = TAPEBLOCK_HSEC_SIZE; 663 set_normalized_cda(ccw, (void *) __pa(dst)); 664 ccw++; 665 dst += TAPEBLOCK_HSEC_SIZE; 666 } 667 BUG_ON(off > bv->bv_len); 668 } 669 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 670 DBF_EVENT(6, "xBREDccwg\n"); 671 return request; 672} 673 674static void 675tape_3590_free_bread(struct tape_request *request) 676{ 677 struct ccw1 *ccw; 678 679 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 680 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 681 if (ccw->cmd_code == READ_FORWARD) 682 clear_normalized_cda(ccw); 683 tape_free_request(request); 684} 685 686/* 687 * check_locate is called just before the tape request is passed to 688 * the common io layer for execution. It has to check the current 689 * tape position and insert a locate ccw if it doesn't match the 690 * start block for the request. 691 */ 692static void 693tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 694{ 695 __u32 *start_block; 696 697 start_block = (__u32 *) request->cpdata; 698 if (*start_block != device->blk_data.block_position) { 699 /* Add the start offset of the file to get the real block. */ 700 *start_block += device->bof; 701 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 702 } 703} 704#endif 705 706static void tape_3590_med_state_set(struct tape_device *device, 707 struct tape_3590_med_sense *sense) 708{ 709 struct tape390_crypt_info *c_info; 710 711 c_info = &TAPE_3590_CRYPT_INFO(device); 712 713 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 714 switch (sense->macst) { 715 case 0x04: 716 case 0x05: 717 case 0x06: 718 tape_med_state_set(device, MS_UNLOADED); 719 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 720 return; 721 case 0x08: 722 case 0x09: 723 tape_med_state_set(device, MS_LOADED); 724 break; 725 default: 726 tape_med_state_set(device, MS_UNKNOWN); 727 return; 728 } 729 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 730 if (sense->flags & MSENSE_CRYPT_MASK) { 731 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 732 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 733 } else { 734 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 735 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 736 } 737} 738 739/* 740 * The done handler is called at device/channel end and wakes up the sleeping 741 * process 742 */ 743static int 744tape_3590_done(struct tape_device *device, struct tape_request *request) 745{ 746 struct tape_3590_disc_data *disc_data; 747 748 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 749 disc_data = device->discdata; 750 751 switch (request->op) { 752 case TO_BSB: 753 case TO_BSF: 754 case TO_DSE: 755 case TO_FSB: 756 case TO_FSF: 757 case TO_LBL: 758 case TO_RFO: 759 case TO_RBA: 760 case TO_REW: 761 case TO_WRI: 762 case TO_WTM: 763 case TO_BLOCK: 764 case TO_LOAD: 765 tape_med_state_set(device, MS_LOADED); 766 break; 767 case TO_RUN: 768 tape_med_state_set(device, MS_UNLOADED); 769 tape_3590_schedule_work(device, TO_CRYPT_OFF); 770 break; 771 case TO_MSEN: 772 tape_3590_med_state_set(device, request->cpdata); 773 break; 774 case TO_CRYPT_ON: 775 TAPE_3590_CRYPT_INFO(device).status 776 |= TAPE390_CRYPT_ON_MASK; 777 *(device->modeset_byte) |= 0x03; 778 break; 779 case TO_CRYPT_OFF: 780 TAPE_3590_CRYPT_INFO(device).status 781 &= ~TAPE390_CRYPT_ON_MASK; 782 *(device->modeset_byte) &= ~0x03; 783 break; 784 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 785 case TO_NOP: /* Same to NOP. */ 786 case TO_READ_CONFIG: 787 case TO_READ_ATTMSG: 788 case TO_DIS: 789 case TO_ASSIGN: 790 case TO_UNASSIGN: 791 case TO_SIZE: 792 case TO_KEKL_SET: 793 case TO_KEKL_QUERY: 794 case TO_RDC: 795 break; 796 } 797 return TAPE_IO_SUCCESS; 798} 799 800/* 801 * This fuction is called, when error recovery was successfull 802 */ 803static inline int 804tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 805{ 806 DBF_EVENT(3, "Error Recovery successful for %s\n", 807 tape_op_verbose[request->op]); 808 return tape_3590_done(device, request); 809} 810 811/* 812 * This fuction is called, when error recovery was not successfull 813 */ 814static inline int 815tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 816 struct irb *irb, int rc) 817{ 818 DBF_EVENT(3, "Error Recovery failed for %s\n", 819 tape_op_verbose[request->op]); 820 tape_dump_sense_dbf(device, request, irb); 821 return rc; 822} 823 824/* 825 * Error Recovery do retry 826 */ 827static inline int 828tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 829 struct irb *irb) 830{ 831 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 832 tape_dump_sense_dbf(device, request, irb); 833 return TAPE_IO_RETRY; 834} 835 836/* 837 * Handle unsolicited interrupts 838 */ 839static int 840tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 841{ 842 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 843 /* Probably result of halt ssch */ 844 return TAPE_IO_PENDING; 845 else if (irb->scsw.cmd.dstat == 0x85) 846 /* Device Ready */ 847 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 848 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 849 tape_3590_schedule_work(device, TO_READ_ATTMSG); 850 } else { 851 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 852 tape_dump_sense_dbf(device, NULL, irb); 853 } 854 /* check medium state */ 855 tape_3590_schedule_work(device, TO_MSEN); 856 return TAPE_IO_SUCCESS; 857} 858 859/* 860 * Basic Recovery routine 861 */ 862static int 863tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 864 struct irb *irb, int rc) 865{ 866 struct tape_3590_sense *sense; 867 868 sense = (struct tape_3590_sense *) irb->ecw; 869 870 switch (sense->bra) { 871 case SENSE_BRA_PER: 872 return tape_3590_erp_failed(device, request, irb, rc); 873 case SENSE_BRA_CONT: 874 return tape_3590_erp_succeded(device, request); 875 case SENSE_BRA_RE: 876 return tape_3590_erp_retry(device, request, irb); 877 case SENSE_BRA_DRE: 878 return tape_3590_erp_failed(device, request, irb, rc); 879 default: 880 BUG(); 881 return TAPE_IO_STOP; 882 } 883} 884 885/* 886 * RDL: Read Device (buffered) log 887 */ 888static int 889tape_3590_erp_read_buf_log(struct tape_device *device, 890 struct tape_request *request, struct irb *irb) 891{ 892 /* 893 * We just do the basic error recovery at the moment (retry). 894 * Perhaps in the future, we read the log and dump it somewhere... 895 */ 896 return tape_3590_erp_basic(device, request, irb, -EIO); 897} 898 899/* 900 * SWAP: Swap Devices 901 */ 902static int 903tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 904 struct irb *irb) 905{ 906 /* 907 * This error recovery should swap the tapes 908 * if the original has a problem. The operation 909 * should proceed with the new tape... this 910 * should probably be done in user space! 911 */ 912 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 913 "different tape unit\n"); 914 return tape_3590_erp_basic(device, request, irb, -EIO); 915} 916 917/* 918 * LBY: Long Busy 919 */ 920static int 921tape_3590_erp_long_busy(struct tape_device *device, 922 struct tape_request *request, struct irb *irb) 923{ 924 DBF_EVENT(6, "Device is busy\n"); 925 return TAPE_IO_LONG_BUSY; 926} 927 928/* 929 * SPI: Special Intercept 930 */ 931static int 932tape_3590_erp_special_interrupt(struct tape_device *device, 933 struct tape_request *request, struct irb *irb) 934{ 935 return tape_3590_erp_basic(device, request, irb, -EIO); 936} 937 938/* 939 * RDA: Read Alternate 940 */ 941static int 942tape_3590_erp_read_alternate(struct tape_device *device, 943 struct tape_request *request, struct irb *irb) 944{ 945 struct tape_3590_disc_data *data; 946 947 /* 948 * The issued Read Backward or Read Previous command is not 949 * supported by the device 950 * The recovery action should be to issue another command: 951 * Read Revious: if Read Backward is not supported 952 * Read Backward: if Read Previous is not supported 953 */ 954 data = device->discdata; 955 if (data->read_back_op == READ_PREVIOUS) { 956 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 957 device->cdev_id); 958 data->read_back_op = READ_BACKWARD; 959 } else { 960 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 961 device->cdev_id); 962 data->read_back_op = READ_PREVIOUS; 963 } 964 tape_3590_read_opposite(device, request); 965 return tape_3590_erp_retry(device, request, irb); 966} 967 968/* 969 * Error Recovery read opposite 970 */ 971static int 972tape_3590_erp_read_opposite(struct tape_device *device, 973 struct tape_request *request, struct irb *irb) 974{ 975 switch (request->op) { 976 case TO_RFO: 977 /* 978 * We did read forward, but the data could not be read. 979 * We will read backward and then skip forward again. 980 */ 981 tape_3590_read_opposite(device, request); 982 return tape_3590_erp_retry(device, request, irb); 983 case TO_RBA: 984 /* We tried to read forward and backward, but hat no success */ 985 return tape_3590_erp_failed(device, request, irb, -EIO); 986 break; 987 default: 988 return tape_3590_erp_failed(device, request, irb, -EIO); 989 } 990} 991 992/* 993 * Print an MIM (Media Information Message) (message code f0) 994 */ 995static void 996tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 997{ 998 struct tape_3590_sense *sense; 999 char *exception, *service; 1000 1001 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1002 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1003 1004 if (!exception || !service) 1005 goto out_nomem; 1006 1007 sense = (struct tape_3590_sense *) irb->ecw; 1008 /* Exception Message */ 1009 switch (sense->fmt.f70.emc) { 1010 case 0x02: 1011 snprintf(exception, BUFSIZE, "Data degraded"); 1012 break; 1013 case 0x03: 1014 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1015 sense->fmt.f70.mp); 1016 break; 1017 case 0x04: 1018 snprintf(exception, BUFSIZE, "Medium degraded"); 1019 break; 1020 case 0x05: 1021 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1022 sense->fmt.f70.mp); 1023 break; 1024 case 0x06: 1025 snprintf(exception, BUFSIZE, "Block 0 Error"); 1026 break; 1027 case 0x07: 1028 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1029 sense->fmt.f70.md); 1030 break; 1031 default: 1032 snprintf(exception, BUFSIZE, "0x%02x", 1033 sense->fmt.f70.emc); 1034 break; 1035 } 1036 /* Service Message */ 1037 switch (sense->fmt.f70.smc) { 1038 case 0x02: 1039 snprintf(service, BUFSIZE, "Reference Media maintenance " 1040 "procedure %i", sense->fmt.f70.md); 1041 break; 1042 default: 1043 snprintf(service, BUFSIZE, "0x%02x", 1044 sense->fmt.f70.smc); 1045 break; 1046 } 1047 1048 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1049 "service %s\n", exception, service); 1050 1051out_nomem: 1052 kfree(exception); 1053 kfree(service); 1054} 1055 1056/* 1057 * Print an I/O Subsystem Service Information Message (message code f1) 1058 */ 1059static void 1060tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1061{ 1062 struct tape_3590_sense *sense; 1063 char *exception, *service; 1064 1065 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1066 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1067 1068 if (!exception || !service) 1069 goto out_nomem; 1070 1071 sense = (struct tape_3590_sense *) irb->ecw; 1072 /* Exception Message */ 1073 switch (sense->fmt.f71.emc) { 1074 case 0x01: 1075 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1076 break; 1077 case 0x02: 1078 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1079 "impact"); 1080 break; 1081 case 0x03: 1082 snprintf(exception, BUFSIZE, "CU Exception on channel " 1083 "interface 0x%02x", sense->fmt.f71.md[0]); 1084 break; 1085 case 0x04: 1086 snprintf(exception, BUFSIZE, "CU Exception on device path " 1087 "0x%02x", sense->fmt.f71.md[0]); 1088 break; 1089 case 0x05: 1090 snprintf(exception, BUFSIZE, "CU Exception on library path " 1091 "0x%02x", sense->fmt.f71.md[0]); 1092 break; 1093 case 0x06: 1094 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1095 sense->fmt.f71.md[0]); 1096 break; 1097 case 0x07: 1098 snprintf(exception, BUFSIZE, "CU Exception on partition " 1099 "0x%02x", sense->fmt.f71.md[0]); 1100 break; 1101 default: 1102 snprintf(exception, BUFSIZE, "0x%02x", 1103 sense->fmt.f71.emc); 1104 } 1105 /* Service Message */ 1106 switch (sense->fmt.f71.smc) { 1107 case 0x01: 1108 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1109 break; 1110 case 0x02: 1111 snprintf(service, BUFSIZE, "Repair will not impact cu " 1112 "performance"); 1113 break; 1114 case 0x03: 1115 if (sense->fmt.f71.mdf == 0) 1116 snprintf(service, BUFSIZE, "Repair will disable node " 1117 "0x%x on CU", sense->fmt.f71.md[1]); 1118 else 1119 snprintf(service, BUFSIZE, "Repair will disable " 1120 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1121 sense->fmt.f71.md[2]); 1122 break; 1123 case 0x04: 1124 if (sense->fmt.f71.mdf == 0) 1125 snprintf(service, BUFSIZE, "Repair will disable " 1126 "channel path 0x%x on CU", 1127 sense->fmt.f71.md[1]); 1128 else 1129 snprintf(service, BUFSIZE, "Repair will disable cannel" 1130 " paths (0x%x-0x%x) on CU", 1131 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1132 break; 1133 case 0x05: 1134 if (sense->fmt.f71.mdf == 0) 1135 snprintf(service, BUFSIZE, "Repair will disable device" 1136 " path 0x%x on CU", sense->fmt.f71.md[1]); 1137 else 1138 snprintf(service, BUFSIZE, "Repair will disable device" 1139 " paths (0x%x-0x%x) on CU", 1140 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1141 break; 1142 case 0x06: 1143 if (sense->fmt.f71.mdf == 0) 1144 snprintf(service, BUFSIZE, "Repair will disable " 1145 "library path 0x%x on CU", 1146 sense->fmt.f71.md[1]); 1147 else 1148 snprintf(service, BUFSIZE, "Repair will disable " 1149 "library paths (0x%x-0x%x) on CU", 1150 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1151 break; 1152 case 0x07: 1153 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1154 break; 1155 default: 1156 snprintf(service, BUFSIZE, "0x%02x", 1157 sense->fmt.f71.smc); 1158 } 1159 1160 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1161 " %s, service %s\n", exception, service); 1162out_nomem: 1163 kfree(exception); 1164 kfree(service); 1165} 1166 1167/* 1168 * Print an Device Subsystem Service Information Message (message code f2) 1169 */ 1170static void 1171tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1172{ 1173 struct tape_3590_sense *sense; 1174 char *exception, *service; 1175 1176 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1177 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1178 1179 if (!exception || !service) 1180 goto out_nomem; 1181 1182 sense = (struct tape_3590_sense *) irb->ecw; 1183 /* Exception Message */ 1184 switch (sense->fmt.f71.emc) { 1185 case 0x01: 1186 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1187 break; 1188 case 0x02: 1189 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1190 " impact"); 1191 break; 1192 case 0x03: 1193 snprintf(exception, BUFSIZE, "DV Exception on channel " 1194 "interface 0x%02x", sense->fmt.f71.md[0]); 1195 break; 1196 case 0x04: 1197 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1198 sense->fmt.f71.md[0]); 1199 break; 1200 case 0x05: 1201 snprintf(exception, BUFSIZE, "DV Exception on message display" 1202 " 0x%02x", sense->fmt.f71.md[0]); 1203 break; 1204 case 0x06: 1205 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1206 break; 1207 case 0x07: 1208 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1209 break; 1210 default: 1211 snprintf(exception, BUFSIZE, "0x%02x", 1212 sense->fmt.f71.emc); 1213 } 1214 /* Service Message */ 1215 switch (sense->fmt.f71.smc) { 1216 case 0x01: 1217 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1218 break; 1219 case 0x02: 1220 snprintf(service, BUFSIZE, "Repair will not impact device " 1221 "performance"); 1222 break; 1223 case 0x03: 1224 if (sense->fmt.f71.mdf == 0) 1225 snprintf(service, BUFSIZE, "Repair will disable " 1226 "channel path 0x%x on DV", 1227 sense->fmt.f71.md[1]); 1228 else 1229 snprintf(service, BUFSIZE, "Repair will disable " 1230 "channel path (0x%x-0x%x) on DV", 1231 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1232 break; 1233 case 0x04: 1234 if (sense->fmt.f71.mdf == 0) 1235 snprintf(service, BUFSIZE, "Repair will disable " 1236 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1237 else 1238 snprintf(service, BUFSIZE, "Repair will disable " 1239 "interfaces (0x%x-0x%x) on DV", 1240 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1241 break; 1242 case 0x05: 1243 if (sense->fmt.f71.mdf == 0) 1244 snprintf(service, BUFSIZE, "Repair will disable loader" 1245 " 0x%x on DV", sense->fmt.f71.md[1]); 1246 else 1247 snprintf(service, BUFSIZE, "Repair will disable loader" 1248 " (0x%x-0x%x) on DV", 1249 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1250 break; 1251 case 0x07: 1252 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1253 break; 1254 case 0x08: 1255 if (sense->fmt.f71.mdf == 0) 1256 snprintf(service, BUFSIZE, "Repair will disable " 1257 "message display 0x%x on DV", 1258 sense->fmt.f71.md[1]); 1259 else 1260 snprintf(service, BUFSIZE, "Repair will disable " 1261 "message displays (0x%x-0x%x) on DV", 1262 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1263 break; 1264 case 0x09: 1265 snprintf(service, BUFSIZE, "Clean DV"); 1266 break; 1267 default: 1268 snprintf(service, BUFSIZE, "0x%02x", 1269 sense->fmt.f71.smc); 1270 } 1271 1272 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1273 " %s, service %s\n", exception, service); 1274out_nomem: 1275 kfree(exception); 1276 kfree(service); 1277} 1278 1279/* 1280 * Print standard ERA Message 1281 */ 1282static void 1283tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1284{ 1285 struct tape_3590_sense *sense; 1286 1287 sense = (struct tape_3590_sense *) irb->ecw; 1288 if (sense->mc == 0) 1289 return; 1290 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1291 if (tape_3590_msg[sense->mc] != NULL) 1292 dev_warn (&device->cdev->dev, "The tape unit has " 1293 "issued sense message %s\n", 1294 tape_3590_msg[sense->mc]); 1295 else 1296 dev_warn (&device->cdev->dev, "The tape unit has " 1297 "issued an unknown sense message code 0x%x\n", 1298 sense->mc); 1299 return; 1300 } 1301 if (sense->mc == 0xf0) { 1302 /* Standard Media Information Message */ 1303 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1304 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1305 sense->fmt.f70.emc, sense->fmt.f70.smc, 1306 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1307 sense->fmt.f70.fid); 1308 tape_3590_print_mim_msg_f0(device, irb); 1309 return; 1310 } 1311 if (sense->mc == 0xf1) { 1312 /* Standard I/O Subsystem Service Information Message */ 1313 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1314 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1315 sense->fmt.f71.sev, device->cdev->id.dev_model, 1316 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1317 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1318 sense->fmt.f71.refcode3); 1319 tape_3590_print_io_sim_msg_f1(device, irb); 1320 return; 1321 } 1322 if (sense->mc == 0xf2) { 1323 /* Standard Device Service Information Message */ 1324 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1325 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1326 sense->fmt.f71.sev, device->cdev->id.dev_model, 1327 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1328 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1329 sense->fmt.f71.refcode3); 1330 tape_3590_print_dev_sim_msg_f2(device, irb); 1331 return; 1332 } 1333 if (sense->mc == 0xf3) { 1334 /* Standard Library Service Information Message */ 1335 return; 1336 } 1337 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1338 "sense message code %x\n", sense->mc); 1339} 1340 1341static int tape_3590_crypt_error(struct tape_device *device, 1342 struct tape_request *request, struct irb *irb) 1343{ 1344 u8 cu_rc, ekm_rc1; 1345 u16 ekm_rc2; 1346 u32 drv_rc; 1347 const char *bus_id; 1348 char *sense; 1349 1350 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1351 bus_id = dev_name(&device->cdev->dev); 1352 cu_rc = sense[0]; 1353 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1354 ekm_rc1 = sense[9]; 1355 ekm_rc2 = *((u16*) &sense[10]); 1356 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1357 /* key not defined on EKM */ 1358 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1359 if ((cu_rc == 1) || (cu_rc == 2)) 1360 /* No connection to EKM */ 1361 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1362 1363 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1364 "encryption key from EKM\n"); 1365 1366 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1367} 1368 1369/* 1370 * 3590 error Recovery routine: 1371 * If possible, it tries to recover from the error. If this is not possible, 1372 * inform the user about the problem. 1373 */ 1374static int 1375tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1376 struct irb *irb) 1377{ 1378 struct tape_3590_sense *sense; 1379 int rc; 1380 1381#ifdef CONFIG_S390_TAPE_BLOCK 1382 if (request->op == TO_BLOCK) { 1383 /* 1384 * Recovery for block device requests. Set the block_position 1385 * to something invalid and retry. 1386 */ 1387 device->blk_data.block_position = -1; 1388 if (request->retries-- <= 0) 1389 return tape_3590_erp_failed(device, request, irb, -EIO); 1390 else 1391 return tape_3590_erp_retry(device, request, irb); 1392 } 1393#endif 1394 1395 sense = (struct tape_3590_sense *) irb->ecw; 1396 1397 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1398 1399 /* 1400 * First check all RC-QRCs where we want to do something special 1401 * - "break": basic error recovery is done 1402 * - "goto out:": just print error message if available 1403 */ 1404 rc = -EIO; 1405 switch (sense->rc_rqc) { 1406 1407 case 0x1110: 1408 tape_3590_print_era_msg(device, irb); 1409 return tape_3590_erp_read_buf_log(device, request, irb); 1410 1411 case 0x2011: 1412 tape_3590_print_era_msg(device, irb); 1413 return tape_3590_erp_read_alternate(device, request, irb); 1414 1415 case 0x2230: 1416 case 0x2231: 1417 tape_3590_print_era_msg(device, irb); 1418 return tape_3590_erp_special_interrupt(device, request, irb); 1419 case 0x2240: 1420 return tape_3590_crypt_error(device, request, irb); 1421 1422 case 0x3010: 1423 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1424 device->cdev_id); 1425 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1426 case 0x3012: 1427 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1428 device->cdev_id); 1429 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1430 case 0x3020: 1431 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1432 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1433 1434 case 0x3122: 1435 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1436 device->cdev_id); 1437 return tape_3590_erp_basic(device, request, irb, -EIO); 1438 case 0x3123: 1439 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1440 device->cdev_id); 1441 tape_med_state_set(device, MS_UNLOADED); 1442 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1443 return tape_3590_erp_basic(device, request, irb, 0); 1444 1445 case 0x4010: 1446 /* 1447 * print additional msg since default msg 1448 * "device intervention" is not very meaningfull 1449 */ 1450 tape_med_state_set(device, MS_UNLOADED); 1451 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1452 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1453 case 0x4012: /* Device Long Busy */ 1454 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1455 tape_3590_print_era_msg(device, irb); 1456 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1457 case 0x4014: 1458 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1459 return tape_3590_erp_long_busy(device, request, irb); 1460 1461 case 0x5010: 1462 if (sense->rac == 0xd0) { 1463 /* Swap */ 1464 tape_3590_print_era_msg(device, irb); 1465 return tape_3590_erp_swap(device, request, irb); 1466 } 1467 if (sense->rac == 0x26) { 1468 /* Read Opposite */ 1469 tape_3590_print_era_msg(device, irb); 1470 return tape_3590_erp_read_opposite(device, request, 1471 irb); 1472 } 1473 return tape_3590_erp_basic(device, request, irb, -EIO); 1474 case 0x5020: 1475 case 0x5021: 1476 case 0x5022: 1477 case 0x5040: 1478 case 0x5041: 1479 case 0x5042: 1480 tape_3590_print_era_msg(device, irb); 1481 return tape_3590_erp_swap(device, request, irb); 1482 1483 case 0x5110: 1484 case 0x5111: 1485 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1486 1487 case 0x5120: 1488 case 0x1120: 1489 tape_med_state_set(device, MS_UNLOADED); 1490 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1491 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1492 1493 case 0x6020: 1494 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1495 1496 case 0x8011: 1497 return tape_3590_erp_basic(device, request, irb, -EPERM); 1498 case 0x8013: 1499 dev_warn (&device->cdev->dev, "A different host has privileged" 1500 " access to the tape unit\n"); 1501 return tape_3590_erp_basic(device, request, irb, -EPERM); 1502 default: 1503 return tape_3590_erp_basic(device, request, irb, -EIO); 1504 } 1505} 1506 1507/* 1508 * 3590 interrupt handler: 1509 */ 1510static int 1511tape_3590_irq(struct tape_device *device, struct tape_request *request, 1512 struct irb *irb) 1513{ 1514 if (request == NULL) 1515 return tape_3590_unsolicited_irq(device, irb); 1516 1517 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1518 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1519 (request->op == TO_WRI)) { 1520 /* Write at end of volume */ 1521 DBF_EVENT(2, "End of volume\n"); 1522 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1523 } 1524 1525 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1526 return tape_3590_unit_check(device, request, irb); 1527 1528 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1529 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1530 if (request->op == TO_FSB || request->op == TO_BSB) 1531 request->rescnt++; 1532 else 1533 DBF_EVENT(5, "Unit Exception!\n"); 1534 } 1535 1536 return tape_3590_done(device, request); 1537 } 1538 1539 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1540 DBF_EVENT(2, "cannel end\n"); 1541 return TAPE_IO_PENDING; 1542 } 1543 1544 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1545 DBF_EVENT(2, "Unit Attention when busy..\n"); 1546 return TAPE_IO_PENDING; 1547 } 1548 1549 DBF_EVENT(6, "xunknownirq\n"); 1550 tape_dump_sense_dbf(device, request, irb); 1551 return TAPE_IO_STOP; 1552} 1553 1554 1555static int tape_3590_read_dev_chars(struct tape_device *device, 1556 struct tape_3590_rdc_data *rdc_data) 1557{ 1558 int rc; 1559 struct tape_request *request; 1560 1561 request = tape_alloc_request(1, sizeof(*rdc_data)); 1562 if (IS_ERR(request)) 1563 return PTR_ERR(request); 1564 request->op = TO_RDC; 1565 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1566 request->cpdata); 1567 rc = tape_do_io(device, request); 1568 if (rc == 0) 1569 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1570 tape_free_request(request); 1571 return rc; 1572} 1573 1574/* 1575 * Setup device function 1576 */ 1577static int 1578tape_3590_setup_device(struct tape_device *device) 1579{ 1580 int rc; 1581 struct tape_3590_disc_data *data; 1582 struct tape_3590_rdc_data *rdc_data; 1583 1584 DBF_EVENT(6, "3590 device setup\n"); 1585 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1586 if (data == NULL) 1587 return -ENOMEM; 1588 data->read_back_op = READ_PREVIOUS; 1589 device->discdata = data; 1590 1591 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1592 if (!rdc_data) { 1593 rc = -ENOMEM; 1594 goto fail_kmalloc; 1595 } 1596 rc = tape_3590_read_dev_chars(device, rdc_data); 1597 if (rc) { 1598 DBF_LH(3, "Read device characteristics failed!\n"); 1599 goto fail_rdc_data; 1600 } 1601 rc = tape_std_assign(device); 1602 if (rc) 1603 goto fail_rdc_data; 1604 if (rdc_data->data[31] == 0x13) { 1605 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1606 tape_3592_disable_crypt(device); 1607 } else { 1608 DBF_EVENT(6, "Device has NO crypto support\n"); 1609 } 1610 /* Try to find out if medium is loaded */ 1611 rc = tape_3590_sense_medium(device); 1612 if (rc) { 1613 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1614 goto fail_rdc_data; 1615 } 1616 return 0; 1617 1618fail_rdc_data: 1619 kfree(rdc_data); 1620fail_kmalloc: 1621 kfree(data); 1622 return rc; 1623} 1624 1625/* 1626 * Cleanup device function 1627 */ 1628static void 1629tape_3590_cleanup_device(struct tape_device *device) 1630{ 1631 flush_scheduled_work(); 1632 tape_std_unassign(device); 1633 1634 kfree(device->discdata); 1635 device->discdata = NULL; 1636} 1637 1638/* 1639 * List of 3590 magnetic tape commands. 1640 */ 1641static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1642 [MTRESET] = tape_std_mtreset, 1643 [MTFSF] = tape_std_mtfsf, 1644 [MTBSF] = tape_std_mtbsf, 1645 [MTFSR] = tape_std_mtfsr, 1646 [MTBSR] = tape_std_mtbsr, 1647 [MTWEOF] = tape_std_mtweof, 1648 [MTREW] = tape_std_mtrew, 1649 [MTOFFL] = tape_std_mtoffl, 1650 [MTNOP] = tape_std_mtnop, 1651 [MTRETEN] = tape_std_mtreten, 1652 [MTBSFM] = tape_std_mtbsfm, 1653 [MTFSFM] = tape_std_mtfsfm, 1654 [MTEOM] = tape_std_mteom, 1655 [MTERASE] = tape_std_mterase, 1656 [MTRAS1] = NULL, 1657 [MTRAS2] = NULL, 1658 [MTRAS3] = NULL, 1659 [MTSETBLK] = tape_std_mtsetblk, 1660 [MTSETDENSITY] = NULL, 1661 [MTSEEK] = tape_3590_mtseek, 1662 [MTTELL] = tape_3590_mttell, 1663 [MTSETDRVBUFFER] = NULL, 1664 [MTFSS] = NULL, 1665 [MTBSS] = NULL, 1666 [MTWSM] = NULL, 1667 [MTLOCK] = NULL, 1668 [MTUNLOCK] = NULL, 1669 [MTLOAD] = tape_std_mtload, 1670 [MTUNLOAD] = tape_std_mtunload, 1671 [MTCOMPRESSION] = tape_std_mtcompression, 1672 [MTSETPART] = NULL, 1673 [MTMKPART] = NULL 1674}; 1675 1676/* 1677 * Tape discipline structure for 3590. 1678 */ 1679static struct tape_discipline tape_discipline_3590 = { 1680 .owner = THIS_MODULE, 1681 .setup_device = tape_3590_setup_device, 1682 .cleanup_device = tape_3590_cleanup_device, 1683 .process_eov = tape_std_process_eov, 1684 .irq = tape_3590_irq, 1685 .read_block = tape_std_read_block, 1686 .write_block = tape_std_write_block, 1687#ifdef CONFIG_S390_TAPE_BLOCK 1688 .bread = tape_3590_bread, 1689 .free_bread = tape_3590_free_bread, 1690 .check_locate = tape_3590_check_locate, 1691#endif 1692 .ioctl_fn = tape_3590_ioctl, 1693 .mtop_array = tape_3590_mtop 1694}; 1695 1696static struct ccw_device_id tape_3590_ids[] = { 1697 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1698 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1699 { /* end of list */ } 1700}; 1701 1702static int 1703tape_3590_online(struct ccw_device *cdev) 1704{ 1705 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1706 &tape_discipline_3590); 1707} 1708 1709static struct ccw_driver tape_3590_driver = { 1710 .name = "tape_3590", 1711 .owner = THIS_MODULE, 1712 .ids = tape_3590_ids, 1713 .probe = tape_generic_probe, 1714 .remove = tape_generic_remove, 1715 .set_offline = tape_generic_offline, 1716 .set_online = tape_3590_online, 1717 .freeze = tape_generic_pm_suspend, 1718}; 1719 1720/* 1721 * Setup discipline structure. 1722 */ 1723static int 1724tape_3590_init(void) 1725{ 1726 int rc; 1727 1728 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1729 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1730#ifdef DBF_LIKE_HELL 1731 debug_set_level(TAPE_DBF_AREA, 6); 1732#endif 1733 1734 DBF_EVENT(3, "3590 init\n"); 1735 /* Register driver for 3590 tapes. */ 1736 rc = ccw_driver_register(&tape_3590_driver); 1737 if (rc) 1738 DBF_EVENT(3, "3590 init failed\n"); 1739 else 1740 DBF_EVENT(3, "3590 registered\n"); 1741 return rc; 1742} 1743 1744static void 1745tape_3590_exit(void) 1746{ 1747 ccw_driver_unregister(&tape_3590_driver); 1748 1749 debug_unregister(TAPE_DBF_AREA); 1750} 1751 1752MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1753MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1754MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1755MODULE_LICENSE("GPL"); 1756 1757module_init(tape_3590_init); 1758module_exit(tape_3590_exit); 1759